Make science fun with hands-on activities that encourage experimentation, observation, and analysis. Use the five provided double-sided activity cards to perform simple experiments using common household and classroom materials, ask observation questions, and introduce basic scientific concepts.. Perfect for stations or independent exploration. Ages 4+.. Each large ring magnet measures 1-1/4" in diameter.. Each colorful plastic disc measures 3/4" in diameter and includes a metal ring around the circumference making it magnetically receptive.. The storage stand comes in 5 pieces and measures approximately 9" L x 2-3/4" W x 4-1/4" H when assembled.. 5+ years. Grade K+